[R] Extracting matched expressions

[Hadley Wickham]

Hi all,

Is there a tool in base R to extract matched expressions from a
regular expression?  i.e. given the regular expression "(.*?) (.*?)
([ehtr]{5})" is there a way to extract the character vector c("one",
"two", "three") from the string "one two three" ?

Thanks,

Hadley

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